An aphid usually stays at one feeding site for a long time for development and reproduction. The green peach aphids, Myzus persicae (Sulzer), feed consistently and regularly throughout all stages of nymphs and adult at one feeding site. In M. persicae, honey dew production, which indicates a state of feeding, occurs at regular intervals within a given stage, and moving, which may be related to escape or dispersal, interrupts feeding, The results of the playback experiments showed that acoustic stimuli with frequencies of 100 and 10000 Hz were effective in inducing feeding repression in M. persicae. That is, HDP occurred less often, and MV occurred more often and longer under acoustic stimuli. In this study, we tested whether the acoustic stimulus effective for inducing feeding suppression decreased reproductive rate in M. persicae. A group of 20 aphids were placed in a host plant and was subject to the acoustic stimulus with two frequency components, 100 and 10000 Hz, for a given time (1, 3, 6, and 12 hours) each day for four days. The result of this experiment showed that the acoustic stimulus did not affect the reproductive rate, regardless of exposure time, in M. persicae.

The green peach aphid, Myzuspersicae Sulzer, is one of the most important insect pest in the world. To assess the efficiency of sound wave to control aphids, we treated a different combination of intensity (66dB, 78dB, 90dB) and frequency (100Hz, 500Hz, 1000Hz) of acoustic stimulus to the aphids. Then we analyzed aphid’s behaviors occurred in each different combination group of acoustic stimulus and control group, and compared them to confirm the most effective sound. We used honey-dew-production (HDP) for behavioral bioassay, which occurs regularly in each nymphal stage and adult period. The rate of HDP decreased in the whole experimental group when compared with control group (F1,358=79.415,P<0.0001). The most effective acoustic frequency was100Hz in which aphids reduced the rate of HDP to approximately 1/3 times lower than that of control group. The treatments of 1000Hz and 500Hz were effective in the order of appearance. The effect of acoustic stimulus seems irregular in the different intensities, and the highest intensity did not show the strongest effect in each frequency. Consequently, the rate of HDP seemed to be affected by the acoustic frequency more than the intensity.